更新时间:2024-06-29 GMT+08:00
BLOCK_SIZE
在ADB中,指定列式存储中每个block存储的Value的个数,也是最小的IO单元。GaussDB(DWS)不支持该属性修改表定义信息,DSC迁移时会将该关键字删除。
输入示例
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DROP TABLE IF EXISTS exists unsupport_parse_test; CREATE TABLE `unsupport_parse_test` ( `username` int, `update` timestamp not null default current_timestamp on update current_timestamp , clustered key clustered_key(shopid ASC, datetype ASC) )BLOCK_SIZE = 1024 index_ALL = 'y'; DROP TABLE IF EXISTS unsupport_parse_test; |
输出示例
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DROP TABLE IF EXISTS "public"."unsupport_parse_test"; CREATE TABLE "public"."unsupport_parse_test" ( "username" INTEGER, "update" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP ) WITH (ORIENTATION = ROW, COMPRESSION = NO) NOCOMPRESS DISTRIBUTE BY HASH ("username"); DROP TABLE IF EXISTS "public"."unsupport_parse_test"; |
父主题: 表(可选参数、操作)